Method of aligning and longitudinally locking cylindrical telescoping sections of increasingly smaller diameter

ABSTRACT

METHOD FOR ALIGNING AND LONGITUDINALLY LOCKING A PLURALITY OF TELESCOPING SECTIONS WITH RESPECT TO EACH OTHER PARTICULARLY A METHOD FOR ALIGNING AND INTERLOCKING SAID SECTIONS AS THEY ARE BEING FILLED WITH PRESSURIZED CONCRETE, SO AS TO TELESCOPE AND EXTEND THE SECTIONS VERTICALLY AS A POLE.

Feb. 23, 1971 METHOD OF ALIGNING AND LONGITUDINALLY LOCKING CYLTELESCOPING 5 Filed March 11, 1969 3,564,804 INDRICAL' ECTIONS OFINCREASINGLY SMALLER DIAMETER 2 Sheets-Sheet 1 B. ARCHER ETAL INVENTORSsemmesandsemmes ATTORNEYS 3,564,804 METHOD OF ALIGNING ANDLONGITUDINALLY LOCKING CYLINDRICAL Feb. 23, 1971 .B. ARCHER ETALTELESCOPING SECTIONS OF INCREASINGLY SMALLER DIAMETER Filed March 11,1969 2 Sheets-Sheet 2 INVENTORS 5M! ppm 5w 70/7 02 10% J semmesandsemmesATTORNEYS United States Patent O 3,564,804 METHOD OF ALIGNING ANDLONGITUDINALLY LOCKING CYLINDRICAL TELESCOPING SEC- TION S FINCREASINGLY SMALLER DIAMETER Bill Archer, Meridian, and John L. LowIII, Laurel, Miss., assignors to Arlo, Inc., Jackson, Miss., acorporation of Mississippi Filed Mar. 11, 1969, Ser. No. 806,174 Int.Cl. E0411 12/12, 12/34 US. Cl. 52-741 3 Claims ABSTRACT OF THEDISCLOSURE Method for aligning and longitudinally locking a plurality oftelescoping sections with respect to each other, particularly a methodfor aligning and interlocking said sections as they are being filledwith pressurized concrete, so 1as to telescope and extend the sectionsvertically as a po e.

CROSS-REF=ERENCES TO RELATED APPLICATIONS Method for aligning andlongitudinally looking a plurality of telescoping sections of the typeillustrated and described in applicants earlier filed applications:

Method for developing a column (Serial 676,286), filed Oct. 18, 1967 andnow Pat. No. 3,471,980.

Method for pumping a column (Serial 702,406), filed Feb. 1, 1968 and nowPat. No. 3,469,358.

BACKGROUND OF THE INVENTION Field of the invention Description of theprior art The prior art is not explicit as to either methods fordeveloping a column by pumping concrete into a plurality of telescopingsections or as to techniques for either aligning or stabilizing thesections one to the other. The prior art forms such as Kelsey (975,135),Rogers (883,569) are bolted or secured one to the other prior to pouringor pumping of the concrete. Sweden (212,189) shows the pouring ofconcrete into telescoping sections which are neither stabilized norinterlocked.

SUMMARY OF THE INVENTION According to the present invention, thetelescoping cylindrical sections are aligned and longitudinally lockedby drawing a top portion of the larger diameter section radiallyinwardly as a top lip stopping flange, while drawing a bottom portion ofthe smaller diameter section radially outward as a complementary bottomlip locking flange, then pumping concrete into said sections so as totelescope the sections until the locking flanges engage one another.

Modifications of invention include drawing the bottom of the smallerdiameter section radially outwardly at spaced circumferential areas soas to define, for example, three, four, or six axially extendingskirt-like elements which are interposed between the overlappingportions of the larger diameter and smaller diameter telescopingsections. Also, further modifications of invention include ICC fillingof grout or a compressible seal intermediate the top lip and the smallerdiameter section.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view,partially in section, showing the column fully telescoped and verticallyextended after pumping with concrete;

FIG. 2 is a fragmentary vertical section showing the interlocking of thelarger diameter and smaller diameter sections with respect to eachother;

FIG. 3 is a transverse sectional View taken along section line 33 ofFIG. 2;

FIG. 4 is a similar transverse sectional view, showing a modificationwherein four axially extending skirt-like elements are employed;

FIG. 5 is a like transverse sectional 'view, showing a furthermodification of the invention wherein six axially extending skirt-likeelements are employed;

FIG. 6 is a fragmentary vertical section, as in FIG. 2, showing amodification of invention wherein the top lip is longitudinally olfsetwith respect to the top so as to define a grout filling pocketintermediate the telescoping sections;

FIG. 7 is a like fragmentary vertical section, showing a furthermodification of invention wherein the top lip and bottom lip arecomplementally configured so as to engage each other upon an inclinedlocking angle;

FIG. 8 is a fragmentary vertical section of interlocking sections,showing a further modification of invention wherein the top lip isinclined and the skirt-like element is chamfered to assist intelescoping; and

FIG. 9 is a like-fragmentary vertical section showing a further frontmodification of invention wherein a compression ring and compressiblesponge-like sealant is placed intermediate the telescoping sections.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1 a vertical column isshown comprised of telescoping sections 10-24 pumped with pressurizedconcrete 28 via an entrance gate 36, the bottom section 10 being set inconcrete base 34 set within ground area 32. Top section 24 may have avent 26. The individual telescoping sections overlap as at 30, and asillustrated fragmentarily in FIGS. 2, 6, and 7. Vertical stability andlongitudinal locking of one section with respect to another isaccomplished by circumferentially inwardly drawing a bead or top lip 34on the larger diameter lower section, while setting a plurality oflongitudinally extending skirtelements 32 on the smaller diametersection bottom 38. As the sections are telescoped vertically by pumpingof concrete 28, the top of the skirt-like secions 32 abut the top lip34. Simultaneously, the intervening spaces 39 between the overlappingsections are filled with concrete. This concrete sets with the concreteinwardly of the sections and enhances vertical stability of theinterlocking sections.

In FIG. 3, three of such skirt-like elements 32, 40 and 44 areillustrated. In FIG. 4, a modification is shown wherein four suchskirt-like elements 32', 40', 44 and 46 are illustrated. Similarly, inFIG. 5, a further modification is illustrated wherein six suchskirt-like elements 32", 40", 44", 46", 48 and 50 are illustrated.

In FIG. 6, a further modification of invention is illustrated, whereinthe inwardly extending top lip 34' on the lower section islongitudinally offset with respect to the top edge so as to define agrout pocket 54 intermediate the overlapping sections 14 and 12. As thesection is pumped and the lower skirt-like elements 56 abut top lip 34grout -52 may be filled into the pocket. In this modification an air gap55 may be provided intermediate top lip 34 and the exterior wall ofsection 14.

In FIG. 7, a further modification is illustrated wherein the top lip 60and the bottom lip 58 have inclined complementary surfaces engaging eachother as at 62 to provide a positive locking seal. An air vent 64 may bedefined so that air or fluid may be urged through the hole as thesections are pumped. A similar air vent 63 is illustrated in FIG. 2.

In FIG. 8 a further modification of invention is illustrated whereinlarger diameter section 12 top lip is comprised of a stop ring 66 weldedat an incline and of sufficient narrowness to provide air gap 78intermediate the two sections. The bottom skirt-like element 68 ischamfered as at 69 to assist in the telescoping of the sections and maybe welded to the bottom section. As concrete is pumped into thetelescoping sections, concrete is urged into the peripheral voidslaterally of the skirt-like element 68, also intermediate top lip ring66 and bottom skirt-like element 68 and within the air gap as at 70.This provides a positive seal and alignment of the elements one to theother.

A further modification of invention is illustrated in FIG. 9 wherein thetop lip 72 is somewhat similar to the top lip in FIG. 8, however, itincludes an inclined face 73 presented opposite the smaller diametersection 14.

The skirt-like element 76 may be welded to the bottom section, leaving aspace sufficient for the fitting of a compression ring 74 and acompressible polyurethane sponge or like sealant ring 78 which undercompression tries to assume it original shape. As the poles are pumpedwith concrete 70, the concrete enters into the peripheral volume betweenthe skirt-like element 76 and the top lip, as illustrated.

Manifestly, the columns may be variously aligned and locked withoutdeparting from the spirit of invention.

We claim:

1. Method of aligning and longitudinally locking cylindrical telescopingsections of increasingly smaller diameter, comprising:

(A) drawing the top lip of the larger diameter section radially inwardas a top lip of narrower width than any axially extending lugs, so as toprovide an air gap between the larger diameter section top and thesmaller diameter section exterior;

(B) drawing a portion of the bottom of the smaller diameter sectionradially outward, as a bottom lip beneath that portion of the largerdiameter section which has been radially inwardly drawn;

(C) positioning a plurality of axially extending lugs on the bottom ofsaid inner section so as to be beneath said top lip which has beenradially, inwardly drawn, said axially extending lugs having tops beingcomplementally configured so as to engage said top lip bottom at aninclined angle, at least three such axially extending lugs beinginterposed between the smaller diameter section bottom and the largerdiameter top;

(-D) filling the remainder of the sections With pressurized concrete,such that the concrete enters and sets between overlapping portions ofsaid sections;

(E) drawing the top lip of the large diameter section radially inwardlyat a point longitudinally offset with respect to the top edge, so as todefine a grout pocket above said lip and intermediate the top edge ofsaid larger diameter section and the bottom exterior of said smallerdiameter section, said drawing of said top lip inwardly being narrowerthan the width of said axially extending lugs, so as to provide an airgap between said larger diameter section top and said smaller diametersection exterior; and

(F) compressively sealing intermediate said top lip and the exterior ofsaid smaller diameter section bottom.

2. Method of aligning and longitudinally locking cy- 25 lindrical,telescoping sections of increasingly smaller diameter as in claim 1,including:

(F) venting said larger diameter section top beneath said top lip. 3.Method of aligning and longitudinally locking cylin- 30 dricaltelescoping sections of increasingly smaller diameter as in claim 1,including:

(G) chamfering the top edge of said axially extending PRICE C. PAW, JR.,Primary Examiner US. Cl. X.R. 52-2, 115, 720

